October 1, at I don’t know if there’s an easy way to do what you want. I guess I’ll need to dig a little further. I do not know why these packets are dropped. I still think there is an error in the text; it says: At first I assumed this strange behavior could be explained by iptables handling tun interfaces in some strange way, but from your explanations that is not case.

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This will let your virtualbox machines talk to your uml machines. TODO Explain how to enable the management interface http: It doesn’t matter which upper layer protocol the packet is coming from. Device or resource busyso that hypothesis can be ruled out.

When you do “etherwake -i tap0”, the frame goes to the application tuun/tap the bottom. I’m creating a bridge, and then add to it two tap interfaces.

I was trying to create two tap interfaces, attach it to a linux bridge, send frame via one tap interface and hoping to receive from the other tap interface.

I suggest you read up some degian networking concepts.

Well, you can create a tunnel! The first byte of the frame you read from the tap interface is the first byte of the destination MAC, and the other fields follow.

Debian Lenny Tun/Tap Bridge Setup

Wiresharks says that it has a “Bogus IP header length 0, must be at least 20 ” I believe it has something to do with. While it’s not strictly required, you may want to spend some more time configuring the nethead uml machine. Android unfortunately has support only for tun.


Notes The setup described above is not tunt/ap same as the setup on my machine.

What happens when we ping to a tun interface. Please read that page and pay special attention to the section on “Setting up bridged tun//tap for VirtualBox “.

Activate TUN/TAP

I didn’t know that the local routing table can be modified, though of course now I don’t see why not. The only thing I can think of is to check that there are no firewall rules on the SUSE boxes that block the ICMPv6 packets in either direction check with ip6tables-save. Now that you’re logged in as root, it’s time to install the necessary packages.

Are you pinging a non-local IP address ie, one that would cause the kernel to actually send the data out, as opposed to replying directly?

How to load tun module in linux? YourServerPort should be changed to your server. It indeed does not check existence before. This is possible because the kernel allows the TUNSETIFF ioctl to succeed if the user issuing it specifies the name of an already existing interface and he is the owner of the interface.

If you don’t see anything entering the tap interface, that’s probably the case. This script is provided below. In your specific example of tap1 and tap2, you could create a second routing table where traffic is routed out tap2, then mark ICMP traffic with iptables, and finally add a routing rule which uses the alternate routing table for marked packets.


Strangely, I can’t make it work on Ubuntu This might sound obvious, but could be a source of confusion at first it was for me. This is not just a raw dump of the data; it contains additional information. Please report any bug or error you find in the code or otherwise in this article.

tcp – How to properly configure a tun/tap Interface in linux? – Unix & Linux Stack Exchange

Subscribe to this blog post Unsubscribe. September 18, at This page is devoted to describing how to configure debian to be able to use a virtual network on your system that lets different virtualization applications to work together and be able to talk to each other on debjan virtual network.

Is there anything I should do first to the read packet from win32 tap driver before tun/tp it to a linux tun driver?

It should definitely work, as long as always tun/twp the client connected to the TAP interface is able to reach the DHCP server and viceversa.